package cn.tedu._07springaop.aop;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.*;
import org.springframework.stereotype.Component;

import java.util.Arrays;

@Aspect
@Component
public class LogAspect {

    @Before("execution(public int cn.tedu._07springaop.aop.CalculatorImpl.*(..))")
    public void beforeMethod(JoinPoint joinPoint){
        String name = joinPoint.getSignature().getName();
        String args = Arrays.toString(joinPoint.getArgs());
        System.out.println("1-前置通知:,"+name+"方法开始执行,参数为:"+args);
    }

    @AfterReturning(value = "execution(public int cn.tedu._07springaop.aop" +
            ".CalculatorImpl.*(..))",returning = "r")
    public void afterReturningMethod(JoinPoint joinPoint,Object r){
        String name = joinPoint.getSignature().getName();
        System.out.println("2-返回通知:"+name+"方法结束，结果为:"+r);
    }

    @AfterThrowing(value = "execution(public int cn.tedu._07springaop.aop" +
            ".CalculatorImpl.*(..))",throwing = "ex")
    public void afterThrowingMethod(JoinPoint joinPoint,Throwable ex){
        String name = joinPoint.getSignature().getName();
        System.out.println("3-异常通知:"+name+"方法异常，提示消息为:"+ex.getMessage());
    }

    @After(value = "execution(public int cn.tedu._07springaop.aop.CalculatorImpl.*(..))")
    public void afterMethod(JoinPoint joinPoint){
        String name = joinPoint.getSignature().getName();
        System.out.println("4-后置通知:目标方法彻底结束后执行");
    }

    @Around(value = "execution(public int cn.tedu._07springaop.aop.CalculatorImpl.*(..))")
    public Object aroundMethod(ProceedingJoinPoint joinPoint){
        Object result = null;
        try{
            System.out.println("环绕1-前置通知");
            result = joinPoint.proceed();
            System.out.println("环绕2-返回通知");
        } catch (Throwable e) {
            System.out.println("环绕3-异常通知");
            throw new RuntimeException(e);
        } finally {
            System.out.println("环绕4-后置通知");
        }
        return result;
    }
}
